Ershov, A.P.; Kasyanov, V.N.; Pokrovskij, S.B.; Pottosin, I.V.; Stepanov, G.G. "Methodology of multilanguage compiler construction: the BETA system example" pp64-80 Russian

Mathematical Theory and Software Practice: Proc. (1982) Mathematical Theory and Software Practice: Proc. Soviet-Bulgarian Workshop, Novosibirsk  

Languages mentioned BETA {1961} Russian List processing ALGOL